Derrick



(No Model.) 2 Sheets-Sheet 1.. D. P. OLIVER.

DERRIGK.

Patented JaJlL, 1891.

ls Permuta, maro-umoQv/nsumcfou, n. c,

(No Mode-1.) l 2 sheets-sheet z.'

D. P'. @LIVER DERRGK No. 444,367. Patentd Jams, 1891.

UNITED STATES v PATENT OFFICE.

DOCTOR F. OLIVER, OF OAKLAND, CALIFORNIA.

DERRICK.

SPECIFICATION forming part of Letters Patent No. 444,367, dated January 6, 1891.

Application filed August l2, 1890. Serial No. 361,830. (No model.)

To aZZ whom it may concern:

Be it known that I, DOCTOR FRANKLIN OLI- VER, a citizen of the United States, residing at Oakland, Alameda county, State of Califorma, have invented an Improvement in Derricks; and I hereby declare the following to be a full, clear, and exact description of the same.

lMy invention relates to the class of derricks, and especially to those derricks adapted for use in stacking hay.

It consists in the novel construction, arrangement, and combination of parts hereinafter fully described, and specifically pointed out in the claims.

The general object of my invention is to provide a simple, effective, andwell-balanced derrick adapted to be readily transported, and Which by reason of its peculiar boom is adapted to deposit the load upon any partof the stack desired.

Referring to the accompanying drawings for a more complete explanation of myinvention, Figure l is a perspective view of my derrick, showing it in an elevated position. Fig. 2 .is a side elevation of same, the mast being lowered to a horizontal position. Fig. 3 isa detail side View of the stop, lock, and clutch mechanism of the boom. Fig. 4 is a plan of same. Fig. 5 is a perspective view of the stop, lock, and clutch mechanism.

A is the bed-frame of the derrick.

B is a standard pivoted at its lower end to the bed-frame, so that itmay turn axially.

C are braces connected at their upper ends with the standard B and at their lower ends with the bed-frame.

E is the mast, consisting` 0l' separated or spaced pieces, the lower ends of which pass down on each side of the standard B, and said mast is pivoted to the upperend of said standard at the point c, whereby the mast can turn from a horizontal to a vertical plane aboutv said pivot, .and can also turn axially with the standard.

The operation of these parts is as follows: IVhen the derrick is being transported, the mast occupies a horizontal position, in which it is supported by the standard B and by the support D, its ends extending beyond said standard and support about an equal distance, whereby the whole device is well baly in a Vertical position, the mast can turn axiallywith the standard, and in order to render this turning automatic I provide for the tilting of the standard by mounting its lower end freely enough in its pivot to allow it to tilt.

It is limited in this tilting movement by the braces O, the upper ends of which are hinged t0 the standard, and the lower ends are vconnected with the bed-frame by a sliding connection, as shown at c, and consisting of bolts from the braces seated in elongated slots in the bed-frame. This connection provides for a movement of the braces sufficient to allow the standard and mast to tilt in any direction, and yet limiting` their movement, the object of the tilting being to allow the mast to turn axially automatically as the load tilts it. Vhen the lnast is elevated and the machine is ready for use, suitable guys c2 are extended from its top to supports in the ground.

F is the boom. This is located between the parts ofthe mast freely, so that it can slidel therein. It is supported by meanslof a rope G, which is connected at its upper end with the upper end of the boom, and thence passes to and over a pulley g in the top of the mast, and thence downwardlybetween the parts of said mast and under a sheave g therein just above the boom, and down to the lower end of the boom, to which it is secured. The boom rests upon a double roller g'gbetween the parts of the mast, and the sheave g ,being j ust above it, serves as a top guide for said boom.

H is the hoisting-rope, the course of which is as follows: From its load end it extends upwardly to and over a pulley f in the outer or upper end of the boom, thence downwardly along said boom and through thc locking de vice hereinafter mentioned, thence to the lowerend of theboom. It thence passes around a pulley f in said lower end, and thence upwardly to and over a pulley g3, mounted within or between the roller g2, and down in front of guide-pulley h between the parts of the mast, and thence downwardly through the hinge by IOO which the braces are connected with the standard B, and to a swinging block l at they ment of the boom and defining its normal position. It consists of a yoke having its inner end freely slotted over the pin which carries sheave g', and its sides are provided with coutact-shoulders j, which bear against the edge of the mast. Upon the boom is the stop K, which comes in contact with the outer end o f stop J. By reason of the slotted connection of stop J with the pin of sheave g' the mast itself, through the shoulders j of said stop, receives the thrust of the stop when the boom descends and its stop K comes in forcible contact with stop J.

The action of the boom is as follows: \Vhen no load is on .the hoisting-rope, the boom returns by gravity to its normal position, its stop K resting against stop J. Now when the load is puton the hoisting-rope and said rope is pulled upon the first effectis to simply raise the load without affecting the position of the boom, which maybe heavier than the load, or preferably locked, as will be presently described; but when the load reaches the height desired and the hoisting-rope is checked by any means, as by coming chucka-block, or otherwise arrested, the boom, if locked, being released, and the hoisting-rope being still pulled upon, the eiect will be to project the boom outwardly, said boom traveling freely on its supporting-rope and between its guides, so that the load is projected forwardly away frotn the mastto any distance desired and deposited in asuitable place upon the stack. When theloadis deposited, thereby relieving the hoisting-rope, the boom returns by gravity to its normal position, and the hoisting-rope descends for another load. Now in order to lock the boom, to release it when desired, and to effect projection when the load has reached any height desired,I have the following device: Mounted in the stop K on the boom is a latch L, controlled by a spring l and operated by a crank Z', to which a cord Z2 is attached and hangs down within reach ofthe operator. Upon the outer end of stop J is a catch-shoulder j', with which the latch automatically engages under the inuence of its spring when the boom returns to its normal position. Thus the boom is locked and will not be projected when the load is being raised; but by pulling on cord I2 the latch is raised, and the boom is then released and will be projected whenever the hoisting-rope is checked. This checking may take place, as before mentioned, when the load comes chuck-a-block; but it can be checked at any point, as follows: The outer end Z3 of latch L is formed as a brake or clutch, which, when the latch is operated to release the boom, as described,co1nes down upon and stops the hoisting-rope, which passes directly under it through the stops K and J, which are provided with passages for it, as shown.

The hoisting-rope, as before stated, passes down through the hinge which connects the braces with the standard. This is necessary to avoid any binding of said rope when the mast swings, and I have accordingly constructed a hinge which will receive and admit the passage of the rope. Thishinge consists of a socket or sleeve M, secured to the braces, and a tubular pintle m, secttred to the standard and fitting in the socket or sleeve.

'lhe hoisting-rope passes through the tubular pintle.

In manipulating the mast to raise or lowcr it a bight of the hoisting-rope is wound upon a cleat a: at the base of the mast. Then the mast is down, the horses may be attached to the hoisting-rope and made to raise said mast. When up, the rope may be slackened,and t-he mast when released may be gradually lowered.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a derrick, the combination of the mast, the longitudinally-slidable boom suspended therefrom, a hoisting-rope connected with the boom for effecting its projection in the direction of its length, and an arresting device for the rope, substantially as herein described.

2. In a derrick, the combination of the mast having the top pulley g, sheave g', rollers g2, and pulley g3 between said rollers, the boom mounted in said mast and guided by the rollers and sheave' and adapted to have a longitudinal sliding movement, said boom having pulleys in the ends thereof, the supportingrope lullig from the top pulley of the mast and connected with the ends of the boom, and the hoisting-rope carried by the boom-pulleys and guided by the mast-pulleys, whereby the projection of the boom is ettected, substantially as herein described.

3. In a dert-ick, the combination of the mast, the suspended slidable boom adapted to be projected therefrom, the hoisting-rope cotinected with the boom for effecting the projection of the same, and a stop for limiting the return of the boom, substantially as herein described.

4. In aderrick, the combination of the mast, the slidable boom suspended from the mast and adapted to be projected therefrom, the hoisting-rope connected with the boom for effecting the projection of the same, the stop on the boom, and the slotted stop J, connected with the mast and having side shoulders bearing against the mast, substantially as herein described.

5. In a derrick, the combination of the mast, the slidable boom mounted therein, the rope G, the hoisting-rope connected with the boom, whereby the projection of the boom is effected, the latch on the boom and means for operating it, and the catch carried by the mast, whereby the boom is locked in normal position and may be released to be projected, substantially as herein described.

6. In a derrick, the combination of the mast,

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the slidable boom, the rope G, the hoistingrope connected with the boom for effecting the projection of the boom, the brake carried by the boom, and means for operating it to engage and arrest the hoisting-rope to aid in projecting the boom, substantially as herein described.

7. In a derriok, the combination of the mast,

the slidable boom, the suspending-rope G, the

stop J, carried by the mast and having a catch-shoulder, the stop K, carried by the boom, the spring-actuated latch mounted in the 'stop K and the crank and cord for operating it, and the hoisting-rope carried by the boom and mast and passing through the stops,

said hoisting-rope beingr engaged by the end of the latch, substantially as herein described S. In a derrick, the combination of the bedframe, the tilting standard pivoted thereto, the mast pivoted to the standard, and the braces hinged to the standard at their upper ends and connected by a slotted connection with the bed-frame at their lower ends, substantially as herein described.

9. In a derriek, the combination of the bedtrarne, the pivoted standard, the braces, the hollow hinge connecting the braces with the standard, the mast pivoted to the standard, the slidable booni carried by the mast, the suspending-rope G, and the hoisting-rope carried by the boom and passing down through the hollow hinge of the standard, substantially as herein described.

In Witness whereof I have hereunto set my hand.

DOCTOR F. OLIVER.

iVitnesses:

S. H. NoURsil, H. C. LEE. 

